Corner-turning apparatus for box-machines.



G F PINKHAM & W H BABB CORNER TURNING APPARATUS FOR BOX MACHINES.

APPLICATION FILED AUG 29 1906 WITH E5 5: 5: 16.

G. P..PINKHAM & W. H. BABB. 001mm TURNING APPARATUS FOR BOX MAGHINESJABILIOATION FILED AUG. 29, 1906.

Patented Feb. 28, 191-1.

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WITPIEEEIF5=DI 0 P PINKHAM & W H BABB 003111111 TURNING APPARATUS FORBox MACHINES.

APPLIOATION FILED AUG. 29, 1906.

Patented Feb. 28, 1911.

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NTTED STATES PATENT OFFICE.

CHARLES F. PINKI-IAM, OF BOSTON, AND W'ILLIAM H.BABB7 OF NORTH ANDOVER,MASSACHUSETTS, ASSIGNORS TO AMERICAN TYPE FOUNDERS COMPANY, OF JERSEYCITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

CORNER-TURNING APPARATUS FOR BOX-MACHINES.

Specification of Letters Patent.

Patented Feb. 28, 1911.

Application filed August 29, 1906. Serial No. 332,549.

To all whom it may concern:

Be it known that We, CHARLES F. PINK- HAM, of Boston, in the county ofSufiolk and State of Massachusetts, and WVILLIAM H. BABE, of NorthAndover, in the county of Essex, in said State, both citizens of theUnited States, have invented a new and useful Improvement inCorner-Turning Apparatus for Box-Machines, of which the following is aspecification.

In an application for Letters Patent, Serial No. 321,031, filed June 9,1906, by Eugene H. Taylor, there is described mechanism especiallydesigned for turning the corners of boxes *made upon machines of thatcharacter in which the box is formed in the act of inserting the blankinto the die by means of the former. In making the box body the partswhich are folded to form the sides or ends of the box have continuationswhich are called tabs which are folded at right angles to attach to thesides or ends.

Our invention relates more specifically to means for turning down thesecontinua tions or tabs which are to be gummed against the inner surfacesof the sidesor ends of the box, and it will be understood by referenceto the drawings, in which Figure l is a front elevation of so much ofthe box machine as comprises the folding die. Fig. 2 is a plan of thecorner or tabturning mechanism referred to above. Fig. 3 is alongitudinal section on line 33 of Fig. 2. Fig. 4 is a cross section online 4l--t of Fig. 3. Fig. 5 is a vertical section on line 55 of Fig. 1.Figs. 6, 7 and 8 show our improvement in various positions, these viewsbeing somewhat enlarged details, a portion of the frame being brokenaway so that the various positions of the blank may be seen. Fig. 9indicates the shape of a blank which may be folded upon our machine.

We will not explain the details of the die or pressure mechanism shownin Fig. l as all these may be like the corresponding parts shown in theTaylor application above referred to. Briefly, the die comprises sidepieces A, and end pieces B, the end pieces being movable slightly bymeans of screws or otherwise so that at the proper time the necessaryamount of pressure may be brought to bear upon the surfaces which havebeen gummed and are in contact to cause the parts to adhere. To thebottom of each side piece A is attached a rail C by means of bolts 0,which rail is shown in cross section in Fig. 4, from which it will beseen that it is grooved so as to receive slide bars D andoD These slidebars are preferably held in place by means of a strip 0 secured byscrews 0 to the under surface of the rail. Each slide bar D, D carries aclamp E, E adjustably secured to it by means of thumb screws 6. Eachclamp has mounted upon it an arm F, F right-angled in shape and havingprojecting from one side a finger f, P. This finger, it will be noted(see Fig. 5), is at a considerable angle to the arm, and it will beseen, particularly from Figs. 2 and 3 that the tip of the finger liesslightly in advance of the front edge of the arm. 'This is desirable forreasons hereinafter explained.

The slide bars carrying the arms are caused to approach each other bysome convenient means. As shown, we have provided a shaft G carrying agear G operated by a rack G which is connected wit-h the drivingmechanism of the machine in such a way that it reciprocates, giving anoscillatory movement to the shaft G. At each end of this shaft G thereis keyed a hub H having an arm h projecting from it and connected by alink h with a slide bar D. The end of this slide bar carries a rack dwhich engages a pinion D mounted in the rail C and each slide bar D alsohas a rack al at its inner end which engages the periphery of the pinionD diametrically opposite the rack d, this construction being such thatupon the rotation of the shaft G the movement given to each slide bar Dcauses the rotation of its gear D and a reciprocation of its slide bar Dso that each pair of slide bars D, D approach and recede from each otherwith each oscillation of the shaft G.

The shaft G is given suflicient movement to cause the arms F, F andtheir fingers f, f to approach each other from a position behind the endpieces B of the die to a position somewhat in front thereof. This willbe understood from Figs. 6, 7 and 8, Figs. 6 and 7 showing the first oroutward position of one of the arms and its finger and Fig. 8 showingthesamearm and finger in its forwardposition where it will be noted Yanism of the machine to receive and clamp the blank and carry it up intothe die by which it is folded. These parts are shown in Fig. 5 in theposition where the blank J I has been clamped between them and theyare-about to start intothe die, the blank be- 'ing folded as they raiseit by its engagement with the walls of thedie. Fig. 6 shows the I blanklifted slightlyx higher than in Fig. 5,

70nd" operation of folding it will be sure to Fig. 6, being, however, aview taken at right angles to Fig. 5." It will be seen in Fig. 6 20'that. the downward projection of the finger f has caused the tab j,which is to form the corner piece of the blank, to be turned slightlydownward and to be given a slight set, which as the blank is carried upinto the dieias shown in Fig. 7, causes the tab to remain insubstantially the position in which the finger f has folded it so thatin the secfold under the adjacent section The arm is then moved forwardinto the position shown in Fig. 8 which wipes the tab around the side ofthe former and holds it in that position while the former andfollower'rise still further to causethe engagement of the.

adjacent section or side of the blank, which indicated at 7' with theedge of the cor- ]responding side A of the die. This movement, ofcourse, is caused by a proper timing of the shaft G which after it hasmoved the arms into position and caused the tabs to be folded. down,reverses its movement and withdraws the arms and their fingers so thatthis portion of the mechanism is in position and condition to receive anew blank and rerepeat its operation; r a

While arms such as those shown might be effective to turn tabs of thischaracter, in

certain-lines of work, and while arms with fingers which do not projectas those shown in the drawings, mayalso be used, we prefer to shape thefingers as shown with a slightly advancededge and set them at an angletothe arms, for the-reason that by this means .the first contact betweenthe finger and'the tab is near the outer edge of the tab and at a pointquite near where it is separated from .what is'to form the side flapofthecover. By

-- reachingover and engaging this portion of the tab inthe firstinstanceit is guided in such a way that it will crease properly and foldinto proper position to receive against 7 itthe adjacent section j whichcarrying the gum finally holds it in place. By giving this initialmovement to the tab by means of a positively moving part we are enabledto use a blank having tabs separated from the adjacent sections by aslit instead of a V which has heretofore been used and has beenconsidered necessary to prevent possibility of the engagement of thetabs with the edges of the sections adjacent thereto during the foldingoperation.

We have attached the arms to the slide .bars by means of clamps simplybecause such a means allows very careful and easy adjustment accordingto any peculiar conditions of the workdepending upon the cut of theblank of the material of which it is made. It is evident that othermeans may be substituted for that shown, but the means shown is simpleand has operated very satisfactorily. r

What we claim as our invention is:

1. In a box making machine, mechanism for turning tabs comprising aformer, a follower, means whereby they are brought togetherto clamp ablank between them, side pieces and end pieces adapted to form a diewithin which said former and follower may slide, slide ways mounted onsaid side pieces and below the lower edge thereof, arms carried by saidslide bars, and means whereby the movement of one slide bar in onedirection will cause the movement. of the other slide bar in theopposite direction, as described;

2. In a box-making machine, tab-turning mechanism comprising arms, eachhaving a finger projecting forward and downward therefrom in combinationwith a former, a follower, a die and means for moving said arms towardand from the line of movement of said former, whereby each tab is firstbrought in contact with a finger as the blank is carried to the die andis given a slight bend out of the plane of the blank and afterward'theblank is moved partially into the die and each tab is wiped around theformer by an arm, as set forth.

3. In a box-making machine, a die, two opposing edges of which projectlower than the adjacent sides, a former and a follower adapted to clampa blank between them and carry said blank within said die whereby thesides of the blank will be folded, the sides engaging the projectingedges of the die being first folded, tab turners, one located at eachend of each projecting edge of the die, and means for moving said tabturners toward each other to turn tabs on the sides of the blank whichis first to be folded and withdrawn from engagement therewith prior tothe folding of the adjacent sides of the blank, said tab turner, eachcomprising an arm and a finger, said finger being adapted to give thefirst turning movement to the tab and thereafter to lose contacttherewith, and said arm being adapted to complete the turning of thetab, as described.

4:. In a box making machine, in combination with a former, a followerand a die, said former and said follower being adapted to clamp a blankby its middle portion, tab turners comprising arms located in pairsadapted to move toward and from each other in a line approximately inthe plane of the edge of the former, said pairs of tab turners beingopposite each other and each arm of each tab turner having a finger pro-10 jecting outwardly and downwardly and adapted to engage the blank nearits edge, as set forth.

5. In a box making machine, means for folding the blank comprising aformer and a follower adapted to clamp the blank between them, a dieadapted to shape the margin of the blank, and tab turners each having afinger the point of which is adapted to engage a corner of the tab nearits outer edge and its line of separation from the blank and insure thedisengagement of said corner from the adjacent edge of the blank eachfinger being mounted upon an arm adapted to fold said tab about saidformer, as set forth.

CHARLES F. PIN KHAM. WILLIAM H. BABE. lVitnesses:

WILSON FISKE, JOHN E. R. Hams.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents,

Washington, D. G.

